Secondly, dress appropriately. I've never interviewed for a job where it would have been too much to wear a suit and tie, but I've also interviewed for some where a button down or polo and khakis would have been OK. My Mother-in-Law has a piece of advice on this topic, and it's dead on the mark, "Dress for the job you want, not the job you have."
I interviewed for a job yesterday, and my interviewers were wearing jeans and T-shirts. A suit and tie would have definitely been way too much!
You and I have had this discussion before. Appropriate dress has a great deal of variety to it in the 21st Century, but I'm almost an anachronistic conservative on the topic. Keep in mind that it was only four years ago that the public school I currently work for dropped the "men are encouraged, although not required, to wear ties" from the faculty dress code.
For that matter, I still dress up when I fly... granted it might be the modern "business casual" of khakis and a polo, but you'll not catch me wearing jeans or shorts on a flight.